common: silence bogus coverity warning

Coverity reports:
  1512891 Uninitialized scalar variable
  The variable will contain an arbitrary value left from earlier computations.

  In lttng_event_serialize(lttng_event const *, unsigned int, char
  const * const *,   char const *, unsigned long, lttng_bytecode *, lttng_payload *): Use of an uninitialized variable (CWE-457)

This warning is bogus since lttng_event_exclusion_comm contains a single
field which is already initialized and is packed (no padding possible).

Initialize the header explicitly to silence the warning.

Reported-by: Coverity Scan
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: Ia1eeee779168b3ac0eb9d0796d503b2d9ab225f2

diff --git a/src/common/event.cpp b/src/common/event.cpp
index dfcc52bc52a71cd810bb51dca67cac851bf20eb6..a6d48eaf7f80e2001226aba7467394e34793183b 100644 (file)
--- a/src/common/event.cpp
+++ b/src/common/event.cpp
@@ -736,7 +736,7 @@ int lttng_event_serialize(const struct lttng_event *event,
        for (i = 0; i < exclusion_count; i++) {
                const size_t exclusion_len =
                        lttng_strnlen(*(exclusion_list + i), LTTNG_SYMBOL_NAME_LEN);
-               struct lttng_event_exclusion_comm exclusion_header;
+               struct lttng_event_exclusion_comm exclusion_header = {};
 
                exclusion_header.len = (uint32_t) exclusion_len + 1;